-20

0

20

40

60

80

100

120

140

160

180

200

220

01.12.07 31.12.07 30.01.08 29.02.08 30.03.08 29.04.08 29.05.08 28.06.08 28.07.08 27.08.08 26.09.08

N2O

Flu

x (n

g N

2O m

-2 s

-1)

-5

-2.5

0

2.5

5

7.5

10

12.5

15

17.5

20

22.5

25

27.5

30

32.5

35

37.5

40

42.5

45

47.5

50

52.5

55

Tem

per

atu

re (

C)

GrG FluxGrT FluxWcG FluxScG FluxAirT KervidySoilT KervidyRainfallpig slurry on winter barleymineral fertiliser 1 on winter barleymineral fertiliser 2 on winter barley

NEU-C4 French landscape (Kervidy-Naizin)

farm inventories

P Durand, N. Akkal, J. Boissy

French site : Land use

maizegrass

wheat

n.a.grasslandwinter wheatmaizebarleyrapeseedpotatoeoatbeancabbage

Farm stead id.

Crop types

specialized breeding systems

Cattle Pig

Mixed breeding systems

Farming systems and associated crop rotations

Cattle+pig Cattle+poultry

Dairy cows Meat cowsDairy cowsmeat pigs

Dairy cowslaying hens

grass≤5y-Maize-Cereal

grass≤5y-Maize

Maize-Cereal-Vegetable

Maize-Cereal

Grass > 10 y

Maize-Maize

Cereal-Cereal

G≤5-M

G>10

C-M-veg

No crops

M-C

M-C-veg

M-C-rapeseed M-M

C-veg

G≤5-M

G(5-10y) -C-M

M-C

M-C-R

G>10y

G (5-10y)-C

G (5-10y)-M

G (5-10y)-M-C

M-C

G(5-10y)-C-Veg

No Animals

M-Veg

M-C-Veg

M-C

piglets

meat

Decreasing frequency

Farm gate budgets:Input Output budget N Efficiency

id N N N N8 153 29 124 19%27 103 32 70 32%6 221 78 144 35%50 270 117 153 43%51 112 51 60 46%52 129 54 76 41%53 121 61 61 50%21 641 476 164 74%40 212 155 57 73%55 196 40 156 20%4 293 191 102 65%11 715 350 365 49%13 908 274 634 30%54 463 222 241 48%29 228 215 13 94%18 388 173 214 45%14 287 81 205 28%22 398 116 282 29%37 1156 381 776 33%39 136 108 22 80%10 182 132 51 8%n

o

ani

mal

s

dai

rym

eat

Pig

sd

airy

+p

ig